Exam 3 Connect Questions Correctly Answered.
Prior to the arrival of a signal from a presynaptic input, the post-synaptic membrane is polar with a greater relative _________ charge in the ECF.
Positive
In somatic neurons, an action potential arrives at the synapse causing synaptic vesicles to ...
Exam 3 Connect Questions Correctly
Answered.
Prior to the arrival of a signal from a presynaptic input, the post-synaptic membrane is polar with a
greater relative _________ charge in the ECF.
Positive
In somatic neurons, an action potential arrives at the synapse causing synaptic vesicles to fuse with
the ____________ membrane.
Presynaptic
Brainpower
Read More
The presynaptic membrane releases (via exocytosis) acetylcholine (ACh) into the ____________ .
ECF of the synaptic cleft
The ACh diffuses across the cleft and binds to the ____________ channels.
Ligand-regulated sodium
Activated (open) sodium channels allow a rapid diffusion of ____________ down its electrochemical
gradient towards the ICF.
Sodium
The movement of positive charges to the ____________ causes the relative charge across the
membrane to become positive on the inner surface.
ICF
In an adult, the spinal cord ends at which vertebra?
L1
An unmyelinated fiber has voltage gated ion gates along its entire ____________ .
Length
An action potential at the ____________ zone causes sodium to diffuse into the cell. This results in
membrane ____________.
Trigger; Depolarization
The depolarization causes a ____________ that excites the entire membrane. This continues until the
traveling signal reaches the end of the ____________ .
,Repetition; Axon
voltage-gated ion channels
Channels that open or close in response to a change in the membrane potential.
membrane potential
Voltage difference across a membrane
Dendrites
Soma
body
Axon
Nodes of Ranvier
Gaps in the myelin sheath
Axon terminals
Branches at the end of the axon
, axon hillock
Cone shaped region of an axon where it joins the cell body
Internode
Space between nodes
Trigger zone
Junction between the axon hillock and the initial segment
Initial segment
Beginning of the axon; attaches to axon hillock
axon collaterals
Side branches of the axon
The benefits of buying summaries with Stuvia:
Guaranteed quality through customer reviews
Stuvia customers have reviewed more than 700,000 summaries. This how you know that you are buying the best documents.
Quick and easy check-out
You can quickly pay through credit card or Stuvia-credit for the summaries. There is no membership needed.
Focus on what matters
Your fellow students write the study notes themselves, which is why the documents are always reliable and up-to-date. This ensures you quickly get to the core!
Frequently asked questions
What do I get when I buy this document?
You get a PDF, available immediately after your purchase. The purchased document is accessible anytime, anywhere and indefinitely through your profile.
Satisfaction guarantee: how does it work?
Our satisfaction guarantee ensures that you always find a study document that suits you well. You fill out a form, and our customer service team takes care of the rest.
Who am I buying these notes from?
Stuvia is a marketplace, so you are not buying this document from us, but from seller ROSEGRADES. Stuvia facilitates payment to the seller.
Will I be stuck with a subscription?
No, you only buy these notes for $16.99. You're not tied to anything after your purchase.
